"Research sponsored by the American Association of State Highway and Transporation Officials in cooperation with the Federal Highway Administration."

TRB's National Cooperative Highway Research Program (NCHRP) Report 672: Roundabouts: An Informational Guide - Second Edition explores the planning, design, cons

The guidance supplied in this document, Roundabouts: an informational guide, is based on established international and U.S. practices and is supplemented by rec

This is the first ever book devoted to the popular hobby of roundabout spotting, featuring over 80 full-colour favourites from humble painted minis to magnifice

Based on a comprehensive evaluation of roundabouts in the United States, NCHRP Report 572 presents methods of estimating the safety and operational impacts of r